Drive of semiconductor laser

OPT OpenIR > 半导体激光器专利数据库

	Drive of semiconductor laser
其他题名	Drive of semiconductor laser
	HOSHI HIROAKI
	1990-08-01
专利权人	キヤノン株式会社
公开日期	1990-08-01
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To make possible a reduction in noise at the time of high output by a method wherein a semiconductor laser having a plurality of current injection regions is used as a light source and a current including an AC component of an almost inverted phase is injected in each of the two injection regions in the almost same frequency to drive the laser. CONSTITUTION:A semiconductor laser 2 is used as a light source, this laser 2 is provided with a plurality of current injection regions 23, 24 and 25 and a reverse bias is applied to a photodiode 26 arranged in the rear of the laser 2 to make it possible to lead out a current to correspond to the output of the laser 2. Moreover, information to be recorded on the basis of a record/regenerated signal recognized by a microprocessor 35 is modulated by a set modulation system, necessary information, such as error correcting codes and the like, is added, the information is converted into a record format and a current is injected in the region 23 through a driving circuit 3 Moreover, a high-frequency current obtained by an oscillation circuit 38 is injected in the region 25 to reduce return light induced noise, a current including an AC component of a phase inverted by an inverting circuit 39 is injected in the region 24 and a bias is applied to the regions 24 and 25 from bias circuits 37 and 36.
其他摘要	目的：通过一种方法可以降低高输出时的噪声，其中使用具有多个电流注入区域的半导体激光器作为光源，并且注入包括几乎反相的AC分量的电流。两个注入区域中的每一个以几乎相同的频率驱动激光器。组成：半导体激光器2用作光源，该激光器2设有多个电流注入区域23,24和25，反向偏压应用于设置在激光器2后部的光电二极管26可以引出电流以对应于激光器2的输出。此外，基于由微处理器35识别的记录/再生信号记录的信息由设定的调制系统调制，必要的信息，例如添加纠错码等，将信息转换成记录格式，并通过驱动电路31将电流注入区域23.此外，由振荡电路38获得的高频电流注入到驱动电路31中。为了减小返回光感应噪声，在区域24中注入包括由反相电路39反相的相位的AC分量的电流，并且从偏置电路37向区域24和25施加偏压。 d 36。
主权项	-
申请日期	1989-01-24
专利号	JP1990194680A
专利状态	失效
申请号	JP1989013280
公开（公告）号	JP1990194680A
IPC 分类号	G11B7/125 \| H01S5/026 \| H01S5/042 \| H01S5/06 \| H01S3/096 \| H01S3/103
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/59611
专题	半导体激光器专利数据库
作者单位	キヤノン株式会社
推荐引用方式 GB/T 7714	HOSHI HIROAKI. Drive of semiconductor laser. JP1990194680A[P]. 1990-08-01.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
JP1990194680A.PDF（286KB）	专利		开放获取	CC BY-NC-SA	请求全文